Struct Timeline 

pub struct Timeline {
    pub name: String,
    pub fps: f32,
    /* private fields */
}

Multi-track animation timeline.

Fields

name: String

Human-readable name for this timeline.

fps: f32

Frames per second (used by frame_count).

Implementations

impl Timeline

pub fn new(name: impl Into<String>) -> Self

Create a new timeline with default fps of 24.

pub fn with_fps(name: impl Into<String>, fps: f32) -> Self

Create a new timeline with an explicit fps value.

pub fn add_track(&mut self, track: AnimTrack)

Add a track to the timeline.

pub fn remove_track(&mut self, name: &str) -> bool

Remove the track named name. Returns true if a track was removed.

pub fn get_track(&self, name: &str) -> Option<&AnimTrack>

Get an immutable reference to the named track.

pub fn get_track_mut(&mut self, name: &str) -> Option<&mut AnimTrack>

Get a mutable reference to the named track.

pub fn track_names(&self) -> Vec<&str>

Sorted list of all track names.

pub fn track_count(&self) -> usize

Number of tracks in this timeline.

pub fn duration(&self) -> f32

Maximum duration across all tracks.

pub fn frame_count(&self) -> usize

Number of frames: ceil(duration * fps).

pub fn evaluate(&self, time: f32) -> HashMap<String, f32>

Evaluate all tracks at time, returning a map of track name to value.

pub fn bake(&self, sample_fps: f32) -> Vec<HashMap<String, f32>>

Sample the timeline at uniform intervals of 1.0 / sample_fps from t = 0 to the timeline duration, returning a Vec of name→value snapshots.

pub fn set_key(&mut self, track_name: &str, time: f32, value: f32)

Add a keyframe to the named track, creating it (with Linear interp) if absent.

pub fn time_offset(&mut self, dt: f32)

Shift all keyframes in every track by dt seconds.

pub fn time_scale(&mut self, factor: f32)

Scale all keyframe times by factor (speed up or slow down the timeline).

Trait Implementations

impl Default for Timeline

fn default() -> Self

Returns the “default value” for a type.